Compound wall structure



July 3, 1928. 1,676,094 L. L. KNOX COMPOUND WALL STRUCTURE Filed Aug. 26, 1926 4 Sheets-Sheet 1 INVENTOR Z mar/W,

July 3, 1928.

L. L. KNOX COMPOUND WALL STRUCTURE Filed Aug. 26, 1926 4 Sheets-Sheet 2 llll'll k III! 1:111; ||||||||a|||||||1 INVENTOR 1 /l7w;;'

July 3, 1928. 1,676,094

, L. L. KNOX COMPOUND WALL STRUCTURE Filed Aug. 26, 1926 4 Sheets-Sheet 5 July 3, 1928.

L. L. KNOX STRUCTURE COM Filed Aug. 26, 1926 4 Sheets-Sheet 4 6a fz gil. I

$3 ffllllrluillllllliill.

thereof, such as table tops, refrigerators,

Fatented July 3, 1928 UNITED STATES PATENT OFFICE.

LUTHER L. KNOX, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO KNOX PRODUCTS COMPANY, OF PITTSBURGH, PENNSYLV'ANIA, A CORPORATION 01 PENNSYL- VANIA.

COMPOUND WALL STRUCTURE.

Application filed August 26, 1926. Serial lot 131,654.

tostructures of this nature suitable for use:

in the: manufacture of furniture or parts storage boxes, display cases, or the like, and especially where it is desirable to maintain a temperature difference on opposite sides of the wall structure.

As disclosed in my application, Serial N 0. 2,872,. filed January 16, 1925, there is provided a compound wall structure embody ing insulating material and covering Inaterial, the. two materials being held in predetermined spaced relation by chaplets, spacers or the like, and the space between the materials being filled by a poured-in filling.

The present invention relates broadly to compound wall structures of this general nature, or suitable for use in the same general manner therein referred to, but has for one of its objects, the provision of an inn proved structure such that the necessity of utilizing separate spacing means is obviated, In this manner, there is provided a structure capable of being more easily assembled.

Another object of the present invention is. to provide an improved wall structure of such nature that a poured-in filling may be utilized but in which the amount of such filling may be maintained at. a minimum, thereby lessening not only the cost of production while giving the desired results, but also materially lessening the. weight.- of the finished structure.

In the accompanying drawings, there is shown for purposes of illustration only, certain preferred embodiments of the present invention, it being understood that the drawings are illustrative only and do not define thelimits of my invention, as changes in the construction therein disclosed and the manner of making finished articles may be changed without departing either from the spirit of the invention or the scope of' my broader claims.

In the drawings, Fig. 1' is a perspective View of one form of insulating bod y constructed in accordance with the present invention.

Fig. 2 is a transverse sectionalview through a refrigerator constructed of insulating bodies substantially as shown in Fig. 14.,

Fig. 3 isthe detail sectional view illustrating one manner of venting a compound Zva'll structure during the pouring-in opera- Fig, 4 is a vertical sectional view on the line IV-IV of Fig. 3 looking in the direction of the arrows.

Fig. 5 is: a detail sectional view on the line VV of Fig. 4 looking in the direction of the arrows.

Fig. 6 is a detail sectional view illustrating one manner of supplying the poured-in filling.

F 7 is a top plan View of one form of preformed insulating body ada-ptablefor use as illustrated in Figs. 1 to 6 both inclusive.

Fig. 8 is a side elevation of the insulating body shown: in Fig. 7.

Fig; 9 is an end elevation of the insulating body of Figs. 7 and 8.

Fig. 10 is a view similar to Fig. 2 illustrating another embodiment-of the invention.

Fig. 11 is a vertical sectional view, partly in elevation, showing still another embodiment of the invention; and,

Fig. 12 is a partial transverse sectional view on the line XII-XII of Fig. 11 looking in the direction of the arrows.

In accordance with the present invention, there may be utilized insulating material of any desired nature, but in View of its lightness, high insulating properties, and ease of handling, preformed cork board may be used to advantage. In F igs- 1 to 9, of the drawings, I have illustrated preformed insulating material preferably in the form of continuously extending zones of such nature that material poured into one of said zones at anypoint may flow into and fill all of said zones. Such a construction is clearly indicated more or less diagrammatically in the perspective view ofFig. 1. While corkboard', as well as other insulating bodies, possess'esthe necessary properties with respect to the transmission ofheat therethrough, it is not possible to utilize such bodies alone for insulating purposes. This is true not only by reason of the susceptibility of suchmaterial to destruction from natural use and wear, but also by reason of the tendency'of moisture laden airto circulate therethrough and there around with a .resulting precipitation and subsequent freezing of the moisture content in suchnianner that in a short time the material loses any insulating properties.

In accordance with thepresent invention, it is'desired to produce a compound wall structure having insulating properties which are substantially permanent whereby such structures may be maintained in continued use for long periods of time. To this end, the insulating body has at least one and preferably both faces thereof protected and substantially encased by a covering body 6, which covering body .may comprise sheet metal or any other desired material. As illustrated in Fig. 2 of the drawings, the inner coveringbody. has the different portions thereof so connected at the corners by Welding, lock-seaming, or the like to provide a substantially continuous lining, Fig.

2 indicating a portion of a structure suitableas a household refrigerator or the like.

In this. embodiment, there is shown a framing strip 7, adapted to form an abutment-for the doors not shown, and a reinforcing and door-carryingstrip 8. The

inner lining preferably extends continuously around the frame 7,and into a groove 9 111 one of the strips 8. It may be held in p0sition therein in any desired manner as by a locking strip 10;- The outer covering may similarly extend continuously around the strips 8 and into grooves 11 therein which are so constructed as to receive other locking strips 12.

, After the desired number of sections have been assembled and the coveringbody has been applied thereto, the structure is ready ing; sound deadening characteristics to the completed structure. By reasonof the cooperating relation of the various grooves in the insulating body, it is only necessary to supply the filling material at one point. As the zones provided by thegrooves are filled, however, it is essential that means be provided for permitting the escape of the air which ,would otherwise be entrapped, to thereby permit complete filling of these zones, it being obvious that the air must be released from substantially the top point of the structure in the-position which it occupies during the filling operation.

' In Figs. 3, 1, and 5 there is illustrated in detail a suitable form of vent for permitting the release of air. This vent may comprise an outlet pipe 13 extending through a suitable opening in the covering body 6 and air into the caseand thence to the outlet pipe- 13. The outlet pipe may be located in one of the upper-corners of the completed structure and after removal of the outlet pipe the opening maybe effectively sealed in any well known manner.

In Fig. 6 there is indicated outlet pipe.

16 extending through a suitable opening in the covering body 6 and threaded into a platel'. similar to plate "14 before described. The cork adjacent this inlet pipe may be cut away toprovide a distributing header 18 as illustrated in Fig. 7 connected, by channels or grooves 19 with any of the grooves 4 formed in the insulating body. This will permit the passage of thefilling materialdirectly to the zonesto be filled and thence throughout the entire' structure. l/Vhere asphalt is the materialutilized, it will be apparent that it will be poured in under such temperature conditions as to flow freely, and under suflicicnt head to insure filling of all of the zones provided therefor. The pouring operation will be continued until the filling material rises into theair outlet pipe 13., l

In the event the insulating body has imperfections therein or is spaced slightly from the covering, body, the poured-in filling will fill such voids or spaces thereby providing a.

tight joint between the respective bodies and preventing any circulation of air. In the event any air remains between the covering bodies, it will be pocketedbetween adjacent zones of poured-in filling insuch manner that dead air spaces will necessarily result.

It will be apparent to those skilled-in the art, that by the use of a grooved insulating body, it is unnecessary to provide chaplets lUU orother spacing means between the insulating body and the covering body. It will further be apparent that it is only essential in a structure. of this general nature that one of the bodies shall have portions thereof out of the plane of the remainder in order to provide zones for the reception of a filler, and instead of providing grooves in the insulating body, the covering body may be so constructed as to serve the same function.

In Fig. 10 of the drawings, there is illustrated an insulating body 2 composed of sections which may have ungrooved faces, this insulating body cooperating with a covering body 6 having ribs, corrugations, depressions, or the like 20 formed therein in such manner as to insure the desired spacing and provide zones 21 for the reception of the poured-in tiller. Communication between the inner and outer zones may be established in any desired manner either by the provision of an opening (not shown) through the insulating body at any desired point, or by directly feeding the filling material. to both sides of the insulating body. lVith the form of the invention illustrated in Fig. 10, the amount of poured-in filler will be materially greater than that present in a structure of the character shown for example in Fig. 2, since the poured-in filler substantially completely covers the insulating body.

In other cases, as illustrated for example in Figs. 11 and 12, it may be desired to provide an insulating body 2 similar to that shown in Fig. 10 with a covering body 6 of such nature that ornamental results are ob tained. Such a covering body may, for example, have panels 22 of different shapes or contours, formed therein and serving to provide zones 23 for the poured-in filler. The high spaces 24 between the panels will form connecting paths for the poured-in filler and coi'nmunication with opposite sides of the insulating body may be established as referred to in connection with. Fig. 10.

In Fig. 11, the inlet 25 is shown as extending completely through a portion of the insulating body and as having a channel 26 cooperating therewith for effecting the desired distribution of such filling material.

The escape of air may in turn be permitted by an opening 27 extending through the insulating body from side to side thereof illustrated. in Fig. 7, it being understood that such an opening will communicate with an outlet connection similar to that shown in Figs. 3. 4t, and 5.

In my co-pending application, Serial No. 710,357 filed hlay 1, 1924, there is disclosed a compound wall structure in which the insulating material is provided with ribs serving to space the insulating material and the covering. Such ribs, however, require the cutting away of a substantial portion of the,

insulating material to permit their formation as therein shown and do not provide as effective an area of contact between the insulating material and the covering material as is provided where the insulating body has comparatively small grooves therein forming zones for the poured-in tiller.

The present invention provides a compound wall structure comprising an insulating body and a covering body in which at least one of the bodies has portions thereof out of the plane of the remainder thereof to provide zones for the reception of a filler, and in which the desired spacing of the re spective bodies results from the provision of portions in different planes. One of the advantages of the invention arises from the provision of assembled bodies having such characteristics and obviates the necessity of separate spacing means.

Other advantages of the invention arise from the possibility of materially decreasing the amount of poured-in filler required, and consequently the weight of the finished structure, by providing zones of relatively small dimensions. Still other advantages arise from the provision of a finished structure capable of having any desired ornamental appcarance imparted thereto by a suitable construction of the covering body.

I claim:

1. A compound wall structure comprising an insulating body and a covering body for certain parts of said insulating body. at least one of said bodies having portions recessed beyond the plane of the remainder thereof to provide zones for the reception of a filler.

2. A compound wall structure comprising an insulating body and a covering body for certain parts of said insulating body, at least one of said bodies having portions recessed beyond the plane of the remainder thereof to provide Zones for a filler, and a filler in said zones spacing the respective bodies.

3. A compound wall structure comprising a pre-formed insulating body and a covering body for certain parts of said insulating body, at least one of said bodies having interconnecting recessed portions beyond the plane of the remainder thereof to provide zones for the reception of a filler.

4. A compound wall structure comprising a pro-formed insulating body and a covering body for certain parts of said insulating body, at least one of said bodies having interconnecting recessed portions beyond the plane of the remainder thereof to provide zones for a filler, and a filler in said zones spacing said bodies.

A compound wall structure, comprising a sectional insulating body of pro-formed material, and a covering body for certain parts of said insulating body, at least one of said bodies having portions recessed beyond the plane of the remainder thereof to provide zones for the reception of a filler.

6. A compound Wall structure comprising aninsulating body, a covering body for certain parts-of said insulating body, at least one of saidbodies having portions thereof out of the plane of the remainder thereof to provide zones for the reception of a filler, and means for permitting a filler to be poured into said zones.

7 A compound Wall structure comprising an insulating body, a covering body for certain parts of said insulating body, at least one of said bodies having portions thereof out of the plane of theren'iainder thereof to provide zones for the reception of a filler, means for permitting a filler to be poured into said zones,'and means for permitting the escape of air from said. zones during the filling operation.

' 8. A compound Wall structure, comprising an insulating body and a covering body cooperating therewith, at least one of said bodies being of irregular cross sectionto provide zones for the reception of a filler.

- 11; A compound Wall-structure comprising an insulating body of pie-formed material having grooves extending in two directions formed therein, said grooves providing communicating zones for the reception of a filling material. I

12. A compound Wall structure'comprising an insulating body and a covering body for certain parts of said insulating body, at least one of said bodies having portions intermediate the edges thereof disposed out of the plane of the remainder to provide zonesior the reception of a filler.

In testimony whereof I have hereunto set my hand;

LUTHER L. KNOX. 

